Speculation over Apple's next iPhone

Jefferson Graham , KSDK12:14 PM. CDT July 22, 2014

AUCKLAND, NEW ZEALAND - SEPTEMBER 28: The new iPhone 5 is launched on September 27, 2012 in Auckland, New Zealand. Telecom, with help of rugby great Jonah Lomu, launched the much-anticipated Apple iPhone 5 last night in Auckland. Jonah was joined by Opshop frontman and New Zealand's Got Talent judge, Jason Kerrison in Wellington via live feed between the two cities. Auckland, Wellington and Christchurch stores opened their doors at 12.01am to eager customers, some waiting since 8am the previous morning. Customers were offered a 'luxury' cueing experience at the Victoria Street West store, with the iPhone officially available for sale at 12:01am. (Photo by Hannah Peters/Getty Images for Telecom)(Photo: Hannah Peters)

LOS ANGELES -- Apple announces quarterly earnings Tuesday, and investors might hope to get a few clues on new products, like a shiny new iPhone.

Apple execs, however, are mum to "pre-announce," products on earnings calls with announcements.

However, we've made the rounds of Apple enthusiast sites, and chats with analysts who cover Apple, to give the rundown on Apple's most coveted new product, the iPhone 6, expected to be released in September.

"They have used this time pretty consistently with it actually shipping towards the end of the month," says Tim Bajarin, an analyst with Creative Strategies. "The main reason for this timing is that they want to book a full quarter of new iPhone sales in the holiday quarter. This is always their largest quarter for iPhone shipments and can't miss this opportunity."

Richard Doherty, an analyst with the Envisioneering Group, predicts Apple will unveil the new phone on September 9th.

Here's what's being speculated about the new iPhone:

Larger screens. Apple is expected to have two models of the iPhone 6 available, both with larger screens than the 4-inch display on the iPhone 5s and 5c models. Apple is expected to come a little closer to the Samsung Galaxy S5's 5.5 inches with a 4.7-inch screen, as well as a second, larger model that will have at least a 5-inch screen, if not larger.

IOS 8. Like clockwork, Apple updates its mobile operating system every fall to accompany the new phone. IOS8 isn't a radical overhaul like last year's update, but does have many new features, including a new photos app that will replace iPhoto, promising to make it easier to transfer pictures to the cloud. Other new Apple apps will tie all the various home automation and health apps into one place, add the ability to add audio to texts, expand keyboard choices and let you open an app within an app.

After years of speculation, Apple is expected to also finally unveil its long-rumored "iWatch," a digital watch that can monitor texts and e-mails, as well as keep time. Piper Jaffray analyst Gene Munster expects the watch, after the iPhone launch, along with new iPads.

For earnings Tuesday, Munster expects Apple to announce sales of 35 million to 36 million iPhones in the quarter, compared to 43.7 million in the previous quarter. Apple historically sells the most iPhones in the first two quarters of its life, as consumers put off their purchases the closer they get to September, when Apple has introduced the new models over the last few years.

Apple reported revenues of $45.6 billion in the last quarter, but analysts expect Apple to report revenues of $37.9 billion, growing to $40.4 billion for the summer quarter.